function URLstrip(path){ 
		if(path==-1){ 
			path = document.location.href;
		}
		var slashcount = 0;
		var urllength = 0;
		if(path.indexOf('http://')>-1){
			for (var i=0; i<path.length; i++){
			var lettercheck = path.substring(i,i+1);
				if (lettercheck == '/'){
					slashcount=slashcount+1;
					if (slashcount == 3){urllength=i;}
				}
			}
		path = path.substring(urllength,(path.length));
		}
	return path;
}
var clPath = "site=cnn_us_dyn_ctxt&id=cnnus&url=http://robots.cnn.com";
clPath += URLstrip(document.location.href);

//for debugging purposes
//document.write(clPath);